/* * Copyright 2009 Red Hat Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Authors: Ben Skeggs */#include<subdev/i2c.h>intnv_rdaux(structnouveau_i2c_port*port,u32addr,u8*data,u8size){if(port->func->aux){if(port->func->acquire)port->func->acquire(port);returnport->func->aux(port,9,addr,data,size);}return-ENODEV;}intnv_wraux(structnouveau_i2c_port*port,u32addr,u8*data,u8size){if(port->func->aux){if(port->func->acquire)port->func->acquire(port);returnport->func->aux(port,8,addr,data,size);}return-ENODEV;}staticintaux_xfer(structi2c_adapter*adap,structi2c_msg*msgs,intnum){structnouveau_i2c_port*port=adap->algo_data;structi2c_msg*msg=msgs;intret,mcnt=num;if(!port->func->aux)return-ENODEV;if(port->func->acquire)port->func->acquire(port);while(mcnt--){u8remaining=msg->len;u8*ptr=msg->buf;while(remaining){u8cnt=(remaining>16)?16:remaining;u8cmd;if(msg->flags&I2C_M_RD)cmd=1;elsecmd=0;if(mcnt||remaining>16)cmd|=4;/* MOT */ret=port->func->aux(port,cmd,msg->addr,ptr,cnt);if(ret<0)returnret;ptr+=cnt;remaining-=cnt;}msg++;}returnnum;}staticu32aux_func(structi2c_adapter*adap){returnI2C_FUNC_I2C|I2C_FUNC_SMBUS_EMUL;}conststructi2c_algorithmnouveau_i2c_aux_algo={.master_xfer=aux_xfer,.functionality=aux_func};